LL-37 regulates odontogenic differentiation of dental pulp stem cells in an inflammatory microenvironment
Abstract Background Inflammation often causes irreversible damage to dental pulp tissue. Dental pulp stem cells (DPSCs), which have multidirectional differentiation ability, play critical roles in the repair and regeneration of pulp tissue. However, the presence of proinflammatory factors can affect...
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BMC
2024-12-01
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| Series: | Stem Cell Research & Therapy |
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| Online Access: | https://doi.org/10.1186/s13287-024-04075-7 |
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| author | Yunfeng Ma Xinyuan Liu Ruoxi Dai Quanli Li Chris Ying Cao |
| author_facet | Yunfeng Ma Xinyuan Liu Ruoxi Dai Quanli Li Chris Ying Cao |
| author_sort | Yunfeng Ma |
| collection | DOAJ |
| description | Abstract Background Inflammation often causes irreversible damage to dental pulp tissue. Dental pulp stem cells (DPSCs), which have multidirectional differentiation ability, play critical roles in the repair and regeneration of pulp tissue. However, the presence of proinflammatory factors can affect DPSCs proliferation, differentiation, migration, and other functions. LL-37 is a natural cationic polypeptide that inhibits lipopolysaccharide (LPS) activity, enhances cytokine production, and promotes the migration of stem cells. However, the potential of LL-37 in regenerative endodontics remains unknown. This study aimed to investigate the regulatory role of LL-37 in promoting the migration and odontogenic differentiation of DPSCs within an inflammatory microenvironment. These findings establish an experimental foundation for the regenerative treatment of pulpitis and provide a scientific basis for its clinical application. Materials and methods DPSCs were isolated via enzyme digestion combined with the tissue block adhesion method and identified via flow cytometry. The impact of LL-37 on the proliferation of DPSCs was evaluated via a CCK-8 assay. The recruitment of DPSCs was assessed through a transwell assay. The mRNA expression levels of inflammatory and aging-related genes were assessed via reverse transcription‒polymerase chain reaction (RT‒PCR), western blotting, and enzyme‒linked immunosorbent assay (ELISA). The odontogenic differentiation of DPSCs was assessed through alkaline phosphatase (ALP) staining, alizarin red staining, and RT‒PCR analysis. Results LL-37 has the potential to enhance the migration of DPSCs. In an inflammatory microenvironment, LL-37 can suppress the expression of genes associated with inflammation and aging, such as TNF-α, IL-1β, IL-6, P21, P38 and P53. Moreover, it promotes odontogenic differentiation in DPSCs by increasing ALP activity, increasing calcium nodule formation, and increasing the expression of dentin-related genes such as DMP1, DSPP and BSP. Conclusion These findings suggest that the polypeptide LL-37 facilitates the migration of DPSCs and plays a crucial role in resolving inflammation and promoting cell differentiation within an inflammatory microenvironment. Consequently, LL-37 has promising potential as an innovative therapeutic approach for managing inflammatory dental pulp conditions. |
| format | Article |
| id | doaj-art-647ba75ce0c24afea41d249cdf854a50 |
| institution | OA Journals |
| issn | 1757-6512 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | BMC |
| record_format | Article |
| series | Stem Cell Research & Therapy |
| spelling | doaj-art-647ba75ce0c24afea41d249cdf854a502025-08-20T01:57:11ZengBMCStem Cell Research & Therapy1757-65122024-12-0115111410.1186/s13287-024-04075-7LL-37 regulates odontogenic differentiation of dental pulp stem cells in an inflammatory microenvironmentYunfeng Ma0Xinyuan Liu1Ruoxi Dai2Quanli Li3Chris Ying Cao4Key Lab. of Oral Diseases Research, College and Hospital of Stomatology, Anhui Medical UniversityKey Lab. of Oral Diseases Research, College and Hospital of Stomatology, Anhui Medical UniversityDepartment of Comprehensive Care, Tufts University School of Dental MedicineDepartment of Stomatology, Longgang Otorhinolaryngology Hospital of Shenzhen, Institute of Oral ScienceKey Lab. of Oral Diseases Research, College and Hospital of Stomatology, Anhui Medical UniversityAbstract Background Inflammation often causes irreversible damage to dental pulp tissue. Dental pulp stem cells (DPSCs), which have multidirectional differentiation ability, play critical roles in the repair and regeneration of pulp tissue. However, the presence of proinflammatory factors can affect DPSCs proliferation, differentiation, migration, and other functions. LL-37 is a natural cationic polypeptide that inhibits lipopolysaccharide (LPS) activity, enhances cytokine production, and promotes the migration of stem cells. However, the potential of LL-37 in regenerative endodontics remains unknown. This study aimed to investigate the regulatory role of LL-37 in promoting the migration and odontogenic differentiation of DPSCs within an inflammatory microenvironment. These findings establish an experimental foundation for the regenerative treatment of pulpitis and provide a scientific basis for its clinical application. Materials and methods DPSCs were isolated via enzyme digestion combined with the tissue block adhesion method and identified via flow cytometry. The impact of LL-37 on the proliferation of DPSCs was evaluated via a CCK-8 assay. The recruitment of DPSCs was assessed through a transwell assay. The mRNA expression levels of inflammatory and aging-related genes were assessed via reverse transcription‒polymerase chain reaction (RT‒PCR), western blotting, and enzyme‒linked immunosorbent assay (ELISA). The odontogenic differentiation of DPSCs was assessed through alkaline phosphatase (ALP) staining, alizarin red staining, and RT‒PCR analysis. Results LL-37 has the potential to enhance the migration of DPSCs. In an inflammatory microenvironment, LL-37 can suppress the expression of genes associated with inflammation and aging, such as TNF-α, IL-1β, IL-6, P21, P38 and P53. Moreover, it promotes odontogenic differentiation in DPSCs by increasing ALP activity, increasing calcium nodule formation, and increasing the expression of dentin-related genes such as DMP1, DSPP and BSP. Conclusion These findings suggest that the polypeptide LL-37 facilitates the migration of DPSCs and plays a crucial role in resolving inflammation and promoting cell differentiation within an inflammatory microenvironment. Consequently, LL-37 has promising potential as an innovative therapeutic approach for managing inflammatory dental pulp conditions.https://doi.org/10.1186/s13287-024-04075-7Dental pulp stem cellsPulpitisPolypeptideLipopolysaccharideOdontogenic differentiation |
| spellingShingle | Yunfeng Ma Xinyuan Liu Ruoxi Dai Quanli Li Chris Ying Cao LL-37 regulates odontogenic differentiation of dental pulp stem cells in an inflammatory microenvironment Stem Cell Research & Therapy Dental pulp stem cells Pulpitis Polypeptide Lipopolysaccharide Odontogenic differentiation |
| title | LL-37 regulates odontogenic differentiation of dental pulp stem cells in an inflammatory microenvironment |
| title_full | LL-37 regulates odontogenic differentiation of dental pulp stem cells in an inflammatory microenvironment |
| title_fullStr | LL-37 regulates odontogenic differentiation of dental pulp stem cells in an inflammatory microenvironment |
| title_full_unstemmed | LL-37 regulates odontogenic differentiation of dental pulp stem cells in an inflammatory microenvironment |
| title_short | LL-37 regulates odontogenic differentiation of dental pulp stem cells in an inflammatory microenvironment |
| title_sort | ll 37 regulates odontogenic differentiation of dental pulp stem cells in an inflammatory microenvironment |
| topic | Dental pulp stem cells Pulpitis Polypeptide Lipopolysaccharide Odontogenic differentiation |
| url | https://doi.org/10.1186/s13287-024-04075-7 |
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